Find the zeroes of quadratic polynomial x^2-7x+12 and verify the relationship between zeroes and coefficients
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x^2 - 7x + 12
= x^2 - 3x - 4x +12
= x (x-3) - 4 (x-3)
= (x-4) (x-3)
x=3 or x=4
Sum of zeroes = - b/a = 7
= 3+4=7
product of zeroes = c/a=12
=4*3=12
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